Rope-driving machinery



(No Model.)

' l Wl A. REBLING.

ROPE DRIVING MACHINERY.

No. 270.1129. Patented Ja,l11.2, M383.

/m/f/V Tof? chinery for` DrawiugVehicles, of which the avoided. The form or shape of the peripheral UNITED 4STATES WASHINGTON A. ROEBLING,

PATENT GFFICE.

OF" BROOKLYN, New YORK,

'ROPE-DRIVING MACHINERY.

SPECIFICATION forming part of Letters Patent N o. 270,129, dated January 2, 1853.

Application led J' une 26,1882. (No model.)

Toall whom it may concern: e i

Be it known that I, WASHINGTON A. Bonn- LING, of Brooklyn, in the county of Klngs and State of New York, have invented new and useful Improvements in Rope-Driving Maiollowiug is a specification.

My invention is applicable to drawing cars and other vehicles on railways, cable-tramways, and inclines, and also to the propulsion of canalboats. It consists essentially of a pair of rope-driving drums rotated by a friction-drum interposed between them. In practice I mount the shafts of the rope-driving drums in sliding boxes, so that the surfaces of the said drums will be drawn against the friction-drum by the stress of the rope, and I incline the axes of the drums in such a way that the rope has a straight lead from one drum to the other, both on top and bottom; and on the upper side (or on the opposite side from that which is in the line of draft) it is conducted from one groove ofthe first drum to the next or succeed-ing groove of the other drum, the Obliquity required to carry the rope from one groove to the next being imparted in passing round the drum, and all tendency of the rope to crowd or climb one coil on another being surfaces of the drums is an important feature. All of the drums may be formed' with such slight concavity or bevel on their peripheries as by compensatingF for their relative'obliquity in position to cause them to workin close fric tional contact from end to end, or through sufcient extent of their surface. In this case the drums are hyperboloids 7 rotating in con tact with each other.` Again, the peripheral surfaces ofthe rope-driving drums may be beveled or concaved to a hyperbolic curve, depending'upon the angle of inclination of the rope-driving drums, the intermediate or friction drum being made a true cylinder, audits peripheral surface of course straight. The line of contact between the drums will be a straight line. Conversely, the Arope-driving drums may be made true cylinders, and the intermediate or friction drum made a hyperboloid, the bevel or concavity of its periphery being such 4as to insure the line of contact between the drums being a straight line. It will he found in practice that the bevel or concavity of the surface of the friction-drum is so slight that if made a true cylinder perfect contact between it and the rope-'driving drums will be obtained in a very short time by the wearing down of the surface through use. i

In the-accompanying drawings, VFigure 1. is a plan view of the combined drum mounted in a suitable` frame or housing. Fig. 2 is an` end View of the same.` Fig. 3 is a diagram,

viewed from the front, illustrating the relative inclination ofthe axes ofthe drums.

The two ropedriving drums A A have their axes inclined to each other sufficiently to cause the rope R to be carried in a straight or` direct line, with a fair lead from its groove or position on one drum toits proper groove or position on the other drum without the interposition of a guidingsheave.

The friction-drum B, which is interposed between the rope-driving drums A A in close con tact with their surfaces, has its axis inclined to an angle midway between the relative angle of inclination of the two other drums-that is to say, the axes ofthe drums A and A'I being, as in the present illustration, inclined in each direction from a horizontal position, the axis of the friction-drum B will be horizontal.

In Fig. 3 the axis of the drum A is represented at a, that ofthe drum A at a/,and that of the drum B at b. In this illustration,where the lower surfaces of the drums are supposed to be in the line hf draft, the grooves in the two drums are in line on such lower surfaces, and the drums are tipped or inclined in opposite directions, each one-half the width between the grooves, so that at top the first groove of one drumis opposite the second groove of the other, and so on in succession. Thesurfacesofeach of the drums are beveled or concaved to such be moving constantly at the same velocity, ex-

cept as hereinafter mentioned. The tendency of thetwo rope-driving drums thus operated will be to move spirally and sidewise in an opposite direction to the friction-drum with which theyarein contact. Thisis prevented hy forming several grooves in the faces of the driving- IOO drums, as shownv aty g g, and corresponding tongues or anges on the friction-drum B, as shown at p. These tongues and grooves, tting one into the other. prevent sidewise motion and furnish additional friction, thereby aiding in imparting the required revolution to the rope-driving drums. This provision can manifestly b e changed by a transposition of the tongues and grooves, the grooves being made on the friction-drum B and the tongues or Hanges on the rope-driving drums A A.

' ln practice I prefer to retain a large proportion of the surfaces of the drums that come in frictional contact with each other free from grooves or flanges, so as to cause the pitchline to coincide and be identical with the line of the surface. f

AIt will be understood` that the Hanges and grooves cannot move together with exact harmony'or Without slip. This constitutes the exception hereinbefore referred to in reference x to the avoidance of slip between lthe contactto the rope-driving drums A A.

By myimprovement side friction or pressure against the journal-bearings is relieved, and is far less than it would be by the use of pinions or other expedients 4heretofore used for such purpose. l

Having thus described. my invention, what I claim as new therein, and desire to secure by Letters Patent, is-

1. The combination of a pair of rope-driving drums on axes oblique to each other, and a friction-d rum interposedbetween them for imparting motion thereto, substantially as described. t

2. The combination of a pair of rope-driving drums, with axes oblique to each other, and an interposed friction-drum, said drums being formed withconcave or beveled faces, substantially as and for the purposes herein set forth.

3. The combination of apair of rope-driving drums running on axes oblique to each other in movable boxes or bearings, and an interposed frictiondrum for imparting motion to said rope-driving drums, substantially as described. 7

4. The combination of apair of rope-driving drums mounted on axes oblique to eachother, and an interposed friction-drum forimparting motion to the same, with tongues or ilangesp and grooves c in the respective drums for the purpose of increasing friction between the drums and of preventing lateral movement, asl

GEORGE W. MGNULTY, EDGARv W. WARREN. 

